Choose finish-appropriate brushes
Active brushes help loosen film from a textured surface, but material and rotation differ by model. Confirm the recommended brush for plaster, pebble or exposed aggregate rather than treating all masonry finishes alike. Track wear and replace brushes before reduced contact harms cleaning performance.
Evaluate transitions and depth
A gradual radius supports climbing better than a sharp ninety-degree joint. Deep ends add travel area and can complicate retrieval. Compare maximum pool dimensions and supported slope behavior with the complete basin, including walls, rather than using gallon capacity as the only size measure.
Prepare for mixed debris
Leaves may dominate in one season while fine plaster dust, pollen or dead algae dominates another. A swappable coarse and fine filter system is useful. Do not use the robot to collect construction debris or fresh plaster residue unless the pool builder and cleaner instructions explicitly allow it.
Inspect the surface before automation
Sharp chips, exposed aggregate, loose tile or damaged drain covers can harm brushes, tracks or cables. Repair hazards first. If the finish is shedding material, determine the cause instead of repeatedly loading the cleaner with grit and assuming filtration is the solution.
Separate cleaning from water treatment
A robot removes settled material and brushes contacted surfaces; it does not sanitize water or repair circulation dead zones. Persistent algae calls for testing chemistry, circulation and filtration. Use the machine as one part of pool care, not as a substitute for correcting the cause.
Use the robotic pool cleaner decision framework to compare the broader category, or narrow the catalog through Robotic Pool Cleaners for In-Ground Pools.
Exact products to compare
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Dolphin Nautilus CC Automatic Robotic Pool Cleaner
Best for: Owners who want a compact established corded cleaner
Dolphin Nautilus CC Plus Robotic Pool Cleaner
Best for: Buyers comparing a widely searched midrange Dolphin
Dolphin Nautilus CC Supreme Wi-Fi Robotic Pool Cleaner
Best for: Large pools needing broader cleaning-zone coverage
Frequently asked questions
Are plaster pools hard on cleaner brushes?
They can be more abrasive than smooth finishes. Use approved brushes, inspect them often and include replacement wear parts in ownership planning.
Can a robot remove algae from concrete?
It can collect loosened dead algae and brush reachable areas. Established or recurring growth requires proper water treatment and may need manual brushing.
Does pebble finish need a special cleaner?
It may require a brush and traction system approved for that texture. Verify the named finish in manufacturer guidance rather than assuming plaster compatibility applies.
Final decision
Match the answer above to the exact model manual, pool measurements and maintenance routine. Amazon listings can change by seller, bundle and generation, so verify the product name and ASIN before relying on a feature.